Before I knew better my husband tried the TENS unit on my back where I had nerve issues and it did not feel good.

The muscle stimulator felt better.

I have read before (in addition to Burrascano) that it's not a good idea to use the TENS.

Like so many other things, it's different for each person. Some can use them without many issues, others can't use them at all.

I used to be able to use my TENS unit, but one day it created more pain instead of lowering my pain. Not long after that, I also could no longer use electric blankets, heating pads, or be in the kitchen when the microwave was working. I became very electro-sensitive (is that a word??).